Electric transmission of intelligence.



ANo. 879,651.

PATENTED FEB. 18, 1908.

I. KITSEE. ELECTRIC TRANSMISSION OP INTELLIGENCE.

APPLIUATION FILED JAN. 26, 1907.

Wmme@ L No. 879,651.v

isiDoR KiTsEE, or PHILADELPHiA, PENNSYLVANIA.

ELECTRIC TRANSMISSION OF INTELLIGENCE.

To all 'whom' 'La'. 'nia'yfconce-m.; Be it known that L IsmoR KITsEE, citizen oi the United States, residing at Philadelphia,

i in the county of Philadelphia andv Stateof l0, Its object is, to provide meansfor the purpose Pennsylvania, vhave inventedA lcertain new and useful Improvements in Electric Transmission of Intelligence, .of which the followling is a specication.` l y My invention relates to an improvement in the electric transmission of intelligence.

of eliminating or counteract-ing the inducing effect of wirescarrying a current for light or power on wires useful for electric transmission of intelli ence.- l

It is wellV own, that a wire carrying a Vvariable vcurrent of considerablev strength L induces 'impulses on neighboringcircultsl These impulses are in direct proportion to the strength and variation of the currentand in inverse proportion to the distance betu'f'een `the two wires.

It is alsowell known that if the prime current is alternating or phase, the impulses iri'duced are flowing in a direction opposite from l=the`direction of the primary source.

ln'practice, when the electro-motive force i 'ofA the inducing current is `comparatively ing cela.

great, even ordinary Morse telegraphy cannot Abe carried o nin the region of the induc- To obviate diiticulty is, as said above,

'i the-'aim of my invention; and I have, in 'theaccompanying drawing, illustrated my method asapplied to a telegraphic line, pro- '-videdzwith a ground return; but it is obvious that* instead of the ground., a-metallic return lmay besubstituted, andinstfead of thetele-` vgraphic-devices, telephonie devices orl other devices useful for the transmission of intelligence 4may be 'substituted` In this drawing, 1 the lline carrying the .current useful for lightor power; that is, the

`electric energy which through itsvariation or change in the direction of flow, is capable of Ainducing impulsesl on the neighboring circuit, here shown as the telegraphic circuit and designated by the numeral 4. The means to accomplish my purpose are illustrated in the drawing as to consistof acondcnser and resistance thecondenser is here shown as one, the capacity of which can be yariedg and l have designated this variable condenser by the letterl andthe resistance ,bythe letter 3. In'.combinatioii with this Specification of Letters Patent.

Applcationiled January 26. 1907- Serial No. 354.209.

Patented Feb. 18, 1908.

condenser 'and resistance connecting Ythe wire l to the circuit 4, Ialso make use of the condensers.

The operation ofv the device is as follows: It is supposed that wire 1 lcarries. a single phase current. It is' also sup ose'd that the phase current is owin inthe ection of the unfeathered arrow. 'spiiofw ofthe current Iwill induce in the neighboring '4 -telegraphic circuit an irri ulse flowing iii o. posits direc tion, or in t e directi,o'ilgagpfl t e -feathered arrow. lf now, the pow,l` wire is connected" vwith the interpositionof-K i lsuch as condensers and resistances, to the isiiitable devices,

circuits 5 grounded with the interposition of telegraphic circuit, va slight current' will flowv :from thispower wire directl into and through thetelegraphc circuitan this 4current will be in the saine directionas the primary source; that is, in opposite direction from the induced impulses. When now, in connection with the resistance, the ca acity of the condenser is varied, it is possi 1e to so adjust the ilow of the prime current, that the saine is equal to the energy ofthe induced current; and as both oppose each other, itis obvious that the eect o the induced current 'can be entirely neutralized through the effect.

of the .slight proportion of prime force flowing in the telegraphc circuit. A

It is'unnecessary for me lto give detailed advice as to how to manage the devices,l so that'the strength of the prime force shall be just suflicient to overcome the strength of the induced force on the line of transmission of electric energy. the start, before any batteries are connected to the line of transmission, a suitable instrument, such as a galvanometer, may be in` serted in said line and the connection be-A tween the power wire and the line of transmission through the variable condenser and 90 It suihces to say'that at e variable resistance made, and both the re- 'l sistance and condenser varied till the galvanometer needle remains at zero or .nearly so.

-I have illustrated inthe drawing, the power lwire as' being connected to the telegraphic 'line at dii'ferentpoints, but in some casesit is inconvenient and impractical to multiply such connections; and in such cases., one single connection of the Ower wire with the line ofl transmission lwi Lsutfice, provided i that enough current can pass over the-conf nection for the purpose of neutralizing the inducing impulses, Where the line of transiio I mission is for telephonie purposes, it is best to provide the 'ground or return connection with an impedance.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is:

1. The method of nuliying the eect of power wires on neighboring wires, which consists iniroducing a' leak between the ower wire an neighboring wire,` said leak a apted to allow the flow of prime energy in said neighboring wire of about equal power as the induced energy.

2. The method of making immune devices inserted in telegraphic lines from neighboring power wires, which consists in causing to How in said telegraphio lines a rime current of the power wire of a force a out equal to the induced current but of opposite direction.

In testimony whereof I affix my signature in presence of two witnesses.

ISIDOR KITSEE. J 

